{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:51.411289", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2025-Mar-16_to_2025-Mar-21_35.0_-20.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2025030000460}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "March 16 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 21 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 94974.54008758818}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Mozambique"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": -20.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 35.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "35.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 34.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 37.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -19.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[37.65, -22.75], [37.68, -22.82], [38.03, -22.97], [38.25, -23.5], [38.15, -23.75], [38.25, -24.0], [38.03, -24.53], [37.5, 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time step", "value": {"2025-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.75, -22.5], [35.97, -21.97], [36.5, -21.75], [36.75, -21.85], [37.0, -21.75], [37.53, -21.97], [37.75, -22.5], [37.65, -22.75], [37.68, -22.82], [38.03, -22.97], [38.25, -23.5], [38.15, -23.75], [38.25, -24.0], [38.03, -24.53], [37.5, -24.75], [37.25, -24.65], [37.0, -24.75], [36.47, -24.53], [36.25, -24.0], [36.35, -23.75], [36.25, -23.5], [36.35, -23.25], [36.32, -23.18], [35.97, -23.03], [35.75, -22.5]]], [[[33.75, -20.5], [33.97, -19.97], [34.5, -19.75], [34.75, -19.85], [35.0, -19.75], [35.53, -19.97], [35.75, -20.5], [35.65, -20.75], [35.75, -21.0], [35.53, -21.53], [35.0, -21.75], [34.47, -21.53], [34.32, -21.18], [33.97, -21.03], [33.75, -20.5]]]]}, "2025-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.47, -23.03], [35.25, -22.5], [35.47, -21.97], [36.0, -21.75], [36.25, -21.85], [36.5, -21.75], [36.75, -21.85], [37.0, -21.75], [37.53, -21.97], [37.75, 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[[[[35.75, -20.0], [35.85, -19.75], [35.75, -19.5], [35.97, -18.97], [36.5, -18.75], [36.75, -18.85], [37.0, -18.75], [37.53, -18.97], [37.75, -19.5], [37.65, -19.75], [37.75, -20.0], [37.65, -20.25], [37.75, -20.5], [37.65, -20.75], [37.75, -21.0], [37.53, -21.53], [37.0, -21.75], [36.47, -21.53], [36.32, -21.18], [35.97, -21.03], [35.75, -20.5], [35.85, -20.25], [35.75, -20.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.9406266657613287}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.3549244536715463}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.340811157226597, 25.290816012295807, 25.485827095277898, 25.476299997965555, 25.518296648108446, 26.00670721871512]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.67305399576827, 24.692257181803427, 24.624141947428427, 25.182579294840536, 25.08146184285482, 25.917956288655603]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.255154371331372, -1.2903117354598521, -1.3148835901354838, -1.4506331324650774, -1.4540477560247693, -1.1088036778695352]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.900086784694622, -1.856443379440293, -1.9406266657613287, -1.7163040349599328, -1.8854427768932283, -1.2026681580310878]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5092280965715381, -1.5204871100731507, -1.6999991760035922, -1.9627188871121937, -1.9642299705878759, -1.5656259210692427]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7737561482251654, -1.636010625654088, -2.112743231459453, -2.432011182779451, -2.4143257326502394, -1.7333155091838588]}}